GenotypeCatechol O-MethyltransferasePolymorphism, GeneticPhenotypeMutationAllelesPolymorphism, Single NucleotideMolecular Sequence DataGenetic Predisposition to DiseaseGene FrequencyGenetic VariationPolymerase Chain ReactionBase SequenceSequence Analysis, DNAPhylogenyHomozygoteCase-Control StudiesPolymorphism, Restriction Fragment LengthHaplotypesHeterozygoteAmino Acid SequenceGenetic MarkersChromosome MappingModels, GeneticPedigreeHepacivirusDNA PrimersMice, Inbred C57BLCrosses, GeneticGene DeletionMice, KnockoutDNA Mutational AnalysisRisk FactorsGenetic LinkageCell DifferentiationChinaMolecular EpidemiologyCells, CulturedReverse Transcriptase Polymerase Chain ReactionLinkage DisequilibriumCluster AnalysisMice, TransgenicRNA, MessengerMethylenetetrahydrofolate Reductase (NADPH2)Asian Continental Ancestry GroupMutation, MissenseSignal TransductionGenetic Complementation TestRNA, Viral